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Credit Facilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Credit Facilities (Additional Information) [Abstract]    
Long-term Debt $ 2,383 $ 2,342
Availability under Revolving Credit Facility [Abstract]    
Long-term Line of Credit $ 567 606
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument Covenant Total Leverage Ratio Maximum 4.00  
Debt Instrument Covenant Permitted Interest Ratio Minimum 3.00  
Revolving Credit Facility [Member]    
Credit Facilities (Additional Information) [Abstract]    
Credit Facilities $ 900  
Availability under Revolving Credit Facility [Abstract]    
Long-term Line of Credit 183 212
Line of Credit Facility, Remaining Borrowing Capacity 489  
Term Loan [Member]    
Credit Facilities (Additional Information) [Abstract]    
Long-term Debt $ 384 $ 394
Letters of credit [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Percentage Of Fronting Fee 0.15%  
Federal Funds Rate [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 0.50%  
One Month L I B O R [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 1.00%  
L I B O R [Member] | Term Loan [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
L I B O R Interest Rate Floor 2.00%  
Minimum [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.30%  
Minimum [Member] | Base Rate [Member] | Term Loan [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 0.75%  
Minimum [Member] | Base Rate [Member] | Base Rate Loans [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 0.50%  
Minimum [Member] | L I B O R [Member] | Euro Dollar Rate [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 1.75%  
Maximum [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.50%  
Maximum [Member] | Base Rate [Member] | Base Rate Loans [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 1.50%  
Maximum [Member] | Base Rate [Member] | Base Rate Loans [Member] | Term Loan [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 1.00%  
Maximum [Member] | L I B O R [Member] | Term Loan [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 1.75%  
Maximum [Member] | L I B O R [Member] | Euro Dollar Rate [Member] | Revolving Credit Facility [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Basis Spread on Variable Rate 2.75%  
Foreign Subsidiaries [Member]    
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Guarantee Percent 65.00%  
Fiscal Year 2020 to 2022 [Member]    
Line of Credit Facility, Periodic Payment, Principal $ 10  
Fiscal Year 2023 [Member]    
Line of Credit Facility, Periodic Payment, Principal 355  
Incremental Credit Facility [Member]    
Credit Facilities (Additional Information) [Abstract]    
Credit Facilities 500  
Credit Facilities [Member]    
Credit Facilities (Additional Information) [Abstract]    
Debt Issuance Costs, Line of Credit Arrangements, Net 7  
Availability under Revolving Credit Facility [Abstract]    
Long-term Line of Credit 1,300  
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Debt Instrument, Unamortized Deferred Costs 4  
Term Loan [Member]    
Availability under Revolving Credit Facility [Abstract]    
Long-term Line of Credit 400  
Revolving Credit Facility [Member]    
Availability under Revolving Credit Facility [Abstract]    
Long-term Line of Credit 900  
Credit Facilities Interest and Fees Guarantees Cov Cal [Abstract]    
Line Of Credit Facility, Limit Of Issuance On Letters Of Credit 600  
Line Of Credit Facility, Sub-limit For Issuance Of Swing Line Loans 50  
Letters of credit [Member]    
Availability under Revolving Credit Facility [Abstract]    
Letters of Credit Outstanding, Amount 40  
Letters of credit [Member] | Revolving Credit Facility [Member]    
Availability under Revolving Credit Facility [Abstract]    
Letters of Credit Outstanding, Amount $ 228