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Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Supplemental disclosures:    
Cash (received for income taxes, net of payments) paid for income taxes, net of refunds $ (4) $ 32
Cash paid for interest 49 52
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases 8 8
Operating cash flows from finance leases 3 3
Financing cash flows from finance leases 3 3
Non-cash investing activities:    
Change in capital expenditures included in accounts payable $ (4) $ (9)