Revenue Contract Balances (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Long-term deferred revenue, beginning balance		$ 217
Long-term deferred revenue, ending balance		241
Liability, change in timeframe, performance obligation satisfied, revenue recognized		0
ASC 606
Contract assets, beginning balance	[1]	39	$ 36
Contract assets, additions/(deletions)		(27)	(17)	[2]
Contract assets, revenue recognized	[3]	0	0	[2]
Contract assets, ending balance		12	19	[2]
Deferred revenue, beginning balance	[1]	23	13
Deferred revenue, additions/(deletions)		5	1	[2]
Deferred revenue, revenue recognized	[3]	(3)	(1)	[2]
Deferred revenue, ending balance		25	13	[2]
Deferred revenue - related parties, beginning balance	[1]	53	65
Deferred revenue - related party, additions/(deletions)		12	9	[2]
Deferred revenue - related parties, revenue recognized	[3]	(16)	(16)	[2]
Deferred revenue - related parties, ending balance		49	58	[2]
Long-term deferred revenue, beginning balance	[1]	90	56
Long-term deferred revenue, additions/(deletions)		6	1	[2]
Long-term deferred revenue, revenue recognized	[3]	0	0	[2]
Long-term deferred revenue, ending balance		96	57	[2]
Long-term deferred revenue - related parties, beginning balance	[1]	55	52
Long-term deferred revenue - related party, additions/(deletions)		1	0	[2]
Long-term deferred revenue - related parties, revenue recognized	[3]	0	0	[2]
Long-term deferred revenue - related parties, ending balance		$ 56	$ 52	[2]

[1] Balance represents ASC 606 portion of each respective line item.

[2] Financial information for the first quarter of 2019 has been retrospectively adjusted for the acquisition of ANDX. See Notes 1 and 3.

[3] No significant revenue was recognized related to past performance obligations in the current periods.