Supplemental Cash Flow Information - Summary of Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net cash provided by operating activities included:
Interest paid (net of amounts capitalized)	$ 303	$ 269
Net income taxes paid to taxing authorities	(9)	42
Non-cash investing and financing activities:
Contribution of net assets	0	143	[1]
Fair value of assets acquired	$ 0	$ 350	[2]

[1] 2019 includes the contribution of net assets to Capline LLC. See Note 13.

[2] 2019 includes the recognition of the Capline LLC equity method investment. See Note 13