Commitments and Contingencies (Details)	Mar. 31, 2016 USD ($)
Minimum
Commitments and contingencies
Possible losses in excess of any amounts accrued	$ 0
Minimum | Patent infringement
Commitments and contingencies
Possible losses in excess of any amounts accrued	0
Minimum | Merchant customer matters
Commitments and contingencies
Possible losses in excess of any amounts accrued	0
Minimum | Other matters
Commitments and contingencies
Possible losses in excess of any amounts accrued	0
Maximum
Commitments and contingencies
Possible losses in excess of any amounts accrued	90,000,000
Maximum | Patent infringement
Commitments and contingencies
Possible losses in excess of any amounts accrued	10,000,000
Maximum | Merchant customer matters
Commitments and contingencies
Possible losses in excess of any amounts accrued	50,000,000
Maximum | Other matters
Commitments and contingencies
Possible losses in excess of any amounts accrued	$ 30,000,000