Discontinued operations - Financial information Operations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Costs and expenses:
Income from discontinued operations, net of tax	$ 30
MDA business | Discontinued operations
Revenues:
Total revenues	75
Costs and expenses:
Selling, general and administrative	13
Depreciation and amortization	4
Impairment loss	12
Operating loss	(9)
Interest expense, net	1
Other income, net	(36)
Income before taxes	26
Income tax benefit	(4)
Income from discontinued operations, net of tax	30
MDA business | Discontinued operations | Product
Revenues:
Total revenues	39
Costs and expenses:
Costs, excluding depreciation and amortization	34
MDA business | Discontinued operations | Service
Revenues:
Total revenues	36
Costs and expenses:
Costs, excluding depreciation and amortization	$ 21