Short-Term Debt and Credit Arrangements (Details 2)		9 Months Ended	12 Months Ended
		Feb. 29, 2016 USD ($)	May. 31, 2015 USD ($)	Oct. 31, 2015 USD ($)
Requirement
Minimum average adjusted TIER over the six most recent fiscal quarters (ratio)	[1]	1.025	1.025
Minimum adjusted TIER for the most recent fiscal year (ratio)	[1],[2]	1.05	1.05
Maximum ratio of adjusted senior debt to total equity (ratio)	[1]	10.00	10.00
Actual
Minimum average adjusted TIER over the six most recent fiscal quarters (ratio)	[1]	1.27	1.28
Minimum adjusted TIER for the most recent fiscal year (ratio)	[1],[2]	1.30	1.30
Maximum ratio of adjusted senior debt to total equity (ratio)	[1]	6.31	5.93
Borrowings outstandings under revised agreements		$ 3,309,020,000	$ 3,127,754,000
Revolving credit agreements
Revolving Credit Agreements
Maximum borrowing capacity		3,310,000,000	3,420,000,000
Increase (Decrease) Line of Credit Facility		45,000,000.000
Total available	[3]	3,309,000,000	3,419,000,000
Letters of credit outstanding		1,000,000	1,000,000
Actual
Borrowings outstandings under revised agreements		0	0
Letter of Credit Maximum Amount Available		290,000,000
Revolving credit agreements | Three Year Agreement Maturing on December 28, 2017 [Member]
Revolving Credit Agreements
Maximum borrowing capacity		25,000,000	1,720,000,000
Total available	[3]	25,000,000	1,719,855,000
Letters of credit outstanding		$ 0	$ 145,000
Line of Credit Facility Commitment Fee Percentage (percent)	[4]	0.075%
Revolving credit agreements | Three Year Consenting Agreement Maturing on November 19, 2018 [Member]
Revolving Credit Agreements
Maximum borrowing capacity		$ 1,640,000,000
Line of Credit Facility Commitment Fee Percentage (percent)	[4]		0.075%
Revolving credit agreements | Three Year Agreement Maturing on November 19, 2018
Revolving Credit Agreements
Maximum borrowing capacity		1,665,000,000
Total available	[3]	1,639,855,000
Revolving credit agreements | Five Year Agreement Maturing on December 28, 2019 [Member]
Revolving Credit Agreements
Maximum borrowing capacity		45,000,000	$ 1,700,000,000
Total available	[3]	45,000,000	1,699,000,000
Letters of credit outstanding		$ 0	$ 1,000,000
Line of Credit Facility Commitment Fee Percentage (percent)	[4]	0.10%
Revolving credit agreements | Five Year Consenting Agreement Maturing on November 19, 2020 [Member]
Revolving Credit Agreements
Maximum borrowing capacity		$ 1,600,000,000
Letters of credit outstanding		1,000,000
Line of Credit Facility Commitment Fee Percentage (percent)	[4]		0.10%
Revolving credit agreements | Five Year Agreement Maturing on November 19, 2020
Revolving Credit Agreements
Maximum borrowing capacity		1,645,000,000
Total available	[3]	1,599,000,000
CFC | Revolving credit agreements
Revolving Credit Agreements
Maximum borrowing capacity		3,420,000,000
Actual
Letter of Credit Maximum Amount Available		300,000,000
NCSC | Revolving credit agreements
Revolving Credit Agreements
Maximum borrowing capacity		$ 110,000,000		$ 155,000,000

[1] In addition to the adjustments made to the leverage ratio set forth in “Item 7. MD&A—Non-GAAP Financial Measures,” senior debt excludes guarantees to member systems that have certain investment-grade ratings by Moody’s and S&P. The TIER and debt-to-equity calculations include the adjustments set forth in “Item 7. MD&A—Non-GAAP Financial Measures” and exclude the results of operations and other comprehensive income for CAH.

[2] We must meet or exceed the required ratios in order to retire patronage capital.

[3] Reflects amounts available from unaffiliated third parties that are not consolidated by CFC.

[4] Facility fee determined by CFC’s senior unsecured credit ratings based on the pricing schedules put in place at the inception of the related agreement.