Discontinued operations - Financial Information Balance sheet (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 15	$ 45
Trade and other receivables, net	125	168
Deferred tax assets	108	117
Property, plant and equipment	27	29
Intangible assets	21	27
Goodwill	287	310
Other assets	44	55
Current assets held for sale	627	751
Liabilities
Accounts payable	48	88
Accrued liabilities	15	18
Accrued compensation and benefits	19	21
Contract liabilities	26	29
Pension and other postretirement benefit liabilities	20	21
Other liabilities	47	53
Current liabilities held for sale	$ 175	$ 230