Changes in the liability for credit losses on unfunded lending-related commitments are summarized as follows:
| in millions | 2013 | 2012 | 2011 | |||||||||
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Balance at beginning of period |
$ | 29 | $ | 45 | $ | 73 | ||||||
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Provision (credit) for losses on lending-related commitments |
8 | (16 | ) | (28 | ) | |||||||
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Balance at end of period |
$ | 37 | $ | 29 | $ | 45 | ||||||
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