Business Combinations (Narrative) (Details)	3 Months Ended	0 Months Ended	3 Months Ended				3 Months Ended
	Jun. 30, 2014 USD ($)	Feb. 06, 2014 Celesio [Member] USD ($)	Jun. 30, 2014 Celesio [Member] USD ($)	Jun. 30, 2014 Celesio [Member] EUR (€)	Mar. 31, 2014 Celesio [Member]	Feb. 06, 2014 Celesio [Member] country	Jun. 30, 2014 The 2014 and 2018 Bonds [Member] Celesio [Member]	Mar. 31, 2014 The 2014 and 2018 Bonds [Member] Celesio [Member]	Jun. 30, 2014 Fair Value, Inputs, Level 3 [Member] Celesio [Member] USD ($)
Business Acquisition [Line Items]
Effective Date of Acquisition		Feb. 06, 2014
Business Acquisition, Percentage of Voting Interests Acquired						77.60%
Name of Acquired Entity		Celesio AG
Cash Paid for Acquisition		$ 4,500,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Debt		2,300,000,000
Business Acquisition, Percentage Of Voting Interests Acquired Fully Diluted	75.90%			75.90%	75.40%	75.60%
Description of Acquired Entity		Celesio is an international wholesale and retail company and a provider of logistics and services to the pharmaceutical and healthcare sectors. Celesio’s headquarters is in Stuttgart, Germany and it operates in 14 countries around the world
Number of Countries in which Entity Operates						14
Debt Conversion, Converted Instrument, Shares Issued							42,238	20,900,000
Consolidation, Less Than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase Of Interest By Parent, Common Shares	1,000,000		1,000,000
Business Acquisition Tender Offer Price				€ 23.50
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent	32,000,000		32,000,000
Annual Recurring Compensation to NCI Under Domination Agreement, Per Share				€ 0.83
Put Option for NCI Under Domination Agreement, Celesio Per Share				€ 22.99
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles									$ 536,000,000