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Leases - Schedule of Cash Flows Related to Company's Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 91	$ 101
Operating cash flows from finance leases	4	2
Financing cash flows from finance leases	6	3	$ 0
Non-cash lease liabilities activity:
Leased assets obtained in exchange for new operating lease liabilities	23	48
Leased assets obtained in exchange for new finance lease liabilities	$ 19	$ 62

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Cash paid for amounts included in the measurement of lease liabilities.

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Non cash lease liabilities activity abstract.

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Amount of interest paid on finance lease liability.

+ References

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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