Acquisition, Collaborative Arrangements and Equity-Method Investment - Acquisition (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Dec. 01, 2014	Mar. 29, 2015		Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill		$ 41,854	[1]	$ 42,069	[1]
Baxter International Inc. [Member]
Business Acquisition [Line Items]
Total consideration transferred	648
Intangible assets	376
Inventory	196
Goodwill	11
Baxter International Inc. [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Intangible assets	$ 371

[1] Amounts may not add due to rounding.