Business Combinations (Narrative) (Details)	3 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended						3 Months Ended		9 Months Ended		3 Months Ended		0 Months Ended
	Dec. 31, 2013 USD ($)	Feb. 06, 2014 Celesio [Member] USD ($)	Jun. 30, 2014 Celesio [Member] USD ($)	Dec. 31, 2014 Celesio [Member] USD ($)	Dec. 31, 2014 Celesio [Member] EUR (€)	Jun. 30, 2014 Celesio [Member] EUR (€)	Mar. 31, 2014 Celesio [Member] EUR (€)	Feb. 06, 2014 Celesio [Member] country	Dec. 31, 2013 Celesio [Member] EUR (€)	Jun. 30, 2014 The 2014 and 2018 Bonds [Member] Celesio [Member]	Mar. 31, 2014 The 2014 and 2018 Bonds [Member] Celesio [Member]	Dec. 31, 2014 Fair Value, Inputs, Level 3 [Member] Celesio [Member] USD ($)	Dec. 31, 2013 Franz Haniel Cie GmbH [Member] Celesio [Member]	Dec. 31, 2013 Senior Bridge Term Loan Agreement, 2013 [Member] Celesio [Member] USD ($)	Mar. 31, 2014 Senior Bridge Term Loan Agreement, 2014 [Member] Celesio [Member] USD ($)	Jan. 13, 2014 Minimum [Member] Celesio [Member]
Business Acquisition [Line Items]
Ownership interest													50.01%
Tender offer price per share						€ 23.50	€ 23.50		€ 23.00
Senior bridge loan														$ 5,500,000,000	$ 5,500,000,000
Senior bridge loan, term														364 days	364 days
Fx option gain (loss)	(13,000,000)
Tender offer, acquisition threshold																75.00%
Acquisition date		Feb. 06, 2014
Shares acquired, percentage								77.60%
Acquiree name		Celesio
Cash paid for acquisition		4,500,000,000
Debt assumed		2,300,000,000
Diluted shares acquired, percentage								75.60%
Acquiree business description		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 acquiree operates								14
Shares issued upon debt conversion										42,238	20,900,000
NCI shares acquired			1,000,000
NCI shares acquired, cash paid			32,000,000
NCI ownership interest, parent					75.90%
Measurement period adjustment, intangible assets				$ 536,000,000								$ 536,000,000
Recurring compensation to NCI, per share					€ 0.83
Guaranteed dividend to NCI, per share					€ 0.83
Put option for NCI, per share					€ 22.99
Put option, interest rate					5.00%