Commitments and Contingencies - Commercial Litigation (Details) - Commercial Litigation - TransWeb Corporation $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($) patent claim
Loss contingencies
Number of counts jury did not rule in favor of Transweb \| claim	1
Number of 3M patents unenforceable due to inequitable conduct \| patent	2
Potential loss due to judgment against 3M \| $	$ 26

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