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Leases - Cash flow (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating cash flows from operating leases
Operating cash flows from operating leases	$ 91	$ 87
Financing cash flows from finance leases	51	40
Right-of-use assets obtained in exchange for operating lease obligations	128	149
Right-of-use assets obtained in exchange for financing leases obligations	$ 35	$ 134

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- Definition

Amount of cash outflow for principal payment on finance lease.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
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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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