Annual report pursuant to Section 13 and 15(d)

Fair Value (Details)

v3.20.4
Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Losses recognized in income from freestanding foreign currency exchange contracts                 $ 3 $ 1 $ 2
Foreign currency impact of highly inflationary countries $ 0 $ 1 $ 0 $ 0 $ 1 $ 3 $ 0 $ 1 2 $ 5 $ 3
Carrying Amount                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Debt 2,597               2,597    
Estimated Fair Value                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Debt $ 2,647               $ 2,647    
Customer Concentration Risk | Net revenue                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Concentration risk, percentage                 25.00% 26.00% 22.00%
Customer Concentration Risk | Revenue Excluding Cost Reimbursements Benchmark [Member]                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Concentration risk, percentage                 10.00% 10.00% 6.00%
TEXAS | Customer Concentration Risk                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Concentration risk, percentage                 10.00% 10.00% 10.00%
Florida                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Percentage Of Sales Revenue Generated From Geographic Transactions Included In Consolidated Statement Of Income                 9.00% 10.00% 10.00%
Florida | Customer Concentration Risk                      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                      
Concentration risk, percentage                 19.00% 20.00% 18.00%