Acquisitions and Divestitures - Divestitures (Details) $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
	May 01, 2017 USD ($)	May 31, 2017 item	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Identity Management Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business	$ 205
Aggregate selling price relative to the divestiture transaction				$ 850
Aggregate pre-tax gain on sale	$ 470
Identity Management Business | Disposal Group, Held-for-sale, Not Discontinued Operations
Divestiture Information
Disposal - Accounts receivable			$ 25	25
Disposal - Property, plant and equipment			20	25
Disposal - Intangible assets			25	35
Disposal - Deferred revenue			30	35
Disposal - Goodwill			250	270
Safety Prescription Eyewear Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Annual sales of divested business			45
Aggregate pre-tax gain on sale			$ 29
Identity Management and Safety Prescription Eyewear In Aggregate | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestiture Information
Number of businesses sold | item		2
Aggregate operating income of divested businesses				$ 20	$ 20